Dinan Free Flow Axle-Back Exhaust - 2009-2015 BMW 750i/750li

Stainless Steel - No Tips - F01/F02

Part # D660-0037 Be the first to write a review
Estimated shipping date: 11/29/2021
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Dinan's Free Flow Axle-Back Exhaust improves exhaust flow by reducing back pressure, resulting in increased power output and a great sporty sound that is civilized when you want it to be and pleasantly aggressive under harder acceleration with zero drone. 100% stainless steel construction and exacting specifications ensure that the system fits correctly using the factory hangers and will resist corrosion for years to come. A vacuum controlled butterfly valve is utilized to improve flow at wide-open throttle while keeping things civilized and "drone" free throughout. The design reduces overall weight as well and ships without tips so that it may attach to the stock tips giving a stock look.


  • More Power: + 11 HP when coupled with engine software
  • Drone abatement technologies used to reduce cabin resonance
  • Enjoyably louder, sportier sound
  • Utilizes factory bumper cut-outs for a "stealth" stock look
  • 100% 304 stainless steel construction
  • Uses the factory brackets and hangers for a factory-like fitment
Dinan Point Value3
Emission Code5
Labor Time (Hours)1.6
Max HP Gain11
Product TypeAxle-Back Exhaust
Part NumberD660-0037

This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.


    *Free Shipping & Handling only offered to the contiguous US on orders over $100, excludes clearance parts and oversized packages.

    Some parts are not legal for use in California or other states with similar regulations.